Найдите область значения функции y=-x²+6x+2.

\[y = - x^{2} + 6x + 2\]

\[a < 0 - ветви\ вниз.\]

\[x_{0} = - \frac{b}{2a} = \frac{6}{2} = 3;\]

\[y_{0} = - 9 + 18 + 2 = 11.\]

\[D(y) = ( - \infty;11\rbrack.\]